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Mar
27
accepted Why “colours” of light are given in wavelength not frequency?
Mar
25
comment Why “colours” of light are given in wavelength not frequency?
You're quite right: We use Hz for radio waves, m for infrared/visible/ultraviolet light and eV for X-rays! Maybe it's simply that these fields started out separately before it was realised that they're just different parts of the same spectrum cf. work and heat energy.
Mar
25
asked Why “colours” of light are given in wavelength not frequency?
Jan
30
awarded  Notable Question
Oct
28
awarded  Popular Question
Aug
4
awarded  Popular Question
Jul
8
asked How do universal battery chargers work
Jul
2
awarded  Curious
May
15
comment Any liquid metallic alloys which are safe to handle with bare hands?
I suppose, while not a true alloy, ferrofluid (ask.metafilter.com/145880/Ferro-fluid-experiment-safe) is relatively harmless and has several metallic properties...
May
14
asked Any liquid metallic alloys which are safe to handle with bare hands?
Mar
20
awarded  Popular Question
Mar
1
awarded  Yearling
Dec
29
awarded  Nice Question
Dec
20
accepted How to smooth the spectrum of a light source?
Dec
19
comment How to smooth the spectrum of a light source?
Direction, partially (more to keep the intensity high enough to be usable than, say, to do imaging). Doesn't a tunable laser have just a few lines, one/some of which can be selected?
Dec
18
asked How to smooth the spectrum of a light source?
Sep
17
comment Why planes have propellers in front but watercraft have them behind?
Thanks, AlanSE. That's insightful information. About stability, does that make vehicles with back-mounted propellers oversteer, and front ones understeer, as back and front-wheel-drive cars do?
Sep
17
accepted Why planes have propellers in front but watercraft have them behind?
Sep
1
asked Why planes have propellers in front but watercraft have them behind?
Apr
30
accepted Gravitational potential outside Lagrangian points or Lagrange points